Tamping-tool.



C. A. DE LAMATER.

TAMPING TOOL. v APPLICATION FILED DEC-8,1913.

Patented Dec. 5, 1916.

A TTOR/VEY CLAUDE A. DE LAMATER, OF KANSAS-CITY, MISSOURI, ASSIGNOR, OF ONE-HALF TO HOWARD K. WEBB, OF KANSAS CITY, MISSOURI.

TAMPING-TOOL.

mosses.

Application filed December 8, 1913.

To all whom it may concern:

Be it known that I, CLAUDE A. DE LA- MATER, a citizen of the United States, residing at Kansas City, in the county of Jackson and State of Missouri, have invented certain new and useful Improvements in Tamping-Tools, of which the following is a specification.

This invention relates to concrete tamping tools and more especially to tools for forcing coarse particles of stone in concrete back from the face of the form in which the concrete is being laid, and incidentally causing the fine particles of the concrete to be compressed against the face of the form for the purpose of producing a smooth exterior finish or face on the completed wall or other structure, and my object is to produce a tool of this character of such construction that it can be operated efliciently in narrow forms of any depth.

vVith this general object in view, the invention comprises the peculiar features of construction below described and claimed, for a full understanding of which reference is to be had to the accompanying drawing,in which Figure 1 is a vertical sectional view through a concrete form showing an edge view of my device in working position in connection with a batch of concrete material; 2 is a plan view of the body portion of the device; Fig. 3 is a transverse section on the line IIIIII of Fig. 2; and Fig. 4, is a perspective view of a modified form of body for the tool.

Referring to the drawing, the same shows in cross section a form 2 for the concrete material 4. The purpose of the invention is to provide an improved tool for pressing or tamping back the coarser particles of this concrete, so that such particles will not lie in the plane of the outer surface after the form has been removed, as otherwise the concrete work will present a rough and porous appearance. By pressing back the coarse particles and at the same time allowing the cement to run out against the form, the concrete material will set to a smooth outer finish, and thereby present a much more attractive and workmanlike appearance. The tool which I have devised comprises a series of curved tines 6 carried by a head member 8 provided with a handle 10, said tines being oval in cross-section and Specification of Letters Patent.

Patented Dcc. 5, 1916.

Serial No. 805,258.

having secured to their lower ends in any suitable manner a flat blade 12, designed to engage flatwise against the interior of the outer wall of the form 2. As illustrated in Figs. 1 and 3, the tines 6 are so curved as to terminate in a vertical plane which is displaced laterally with reference to the vertical plane in which lie the handle 10 and the head member 8. lVhen the blade 12 is flatly engaged against the inner face of the outer wall of the form 2, it is obvious that the tines 6 will bow away inward from said outer wall, so that if the tool be moved downward through the concrete material while maintaining the blade flat against the form, the tines will encounter the larger particles of the concrete and force them back from the outer wall, but will at the same time allow the finer particles and the liquid portions of the concrete to pass between the tines and remain next to the form. For carrying out this tamping of the coarse particles of the concrete back from the front wall of the form with a tool of the construction described, it is apparent that it is only necessary to reciprocate the handle 10 endwise, whereas with the devices ordinarily used and consisting merely of flat perforated blades, it is necessary both to reciprocate and to give the blade a lateral prying movement to force back the coarse particles of the concrete material. By providing the curved tines the need of any lateral movement is eliminated and my device can accordingly be used in forms too narrow to admit of pivotal or prying movement or action for the purpose named.

In Fig. 4, I show a modification in which the tines are substantially straight and the blade wedge-shaped and provided with grooves lt to permit the fine particles to move forward as the large particles or rocks are forced rearwardly by the rear or inclined face of the blade, the tines serving in this construction to permit the fine material to pass forward and to simply retain the coarse particles or rock in the position to which it has been forced by the blade.

From the foregoing it will be apparent that I have provided avery simple and efficient device for carrying out the objects of my invention. and while I have illustrated and described two forms of the same I reserve the right to such changes and modifioations as may properly all within the scope of the appended claim.

I .claimi A concrete tamping tool comprising a head 8, a handle secured at one end to and lying in the same vertical plane as said head, a blade 12 paralleling and offset with respect to the plane of the head, and curved parallel tines 6 extending. from the head to the blade and of oval shape in cross section, said blade being offset with respect to the head and handle and the tines being curved to permit the tool when reciprocated vertically with the blade bearing flatly against a wall of a form, to ttlllDCOdISe particles of concrete away from the said wall to prolnce a smooth finish 011 the face of the work abutting said wall.

In testimony whereof, I aflix my signature, in the presence of two witnesses.

CLAUDE A. DE LAIAATER. lVitnesses H. C. RODGERS, G. Y. THORPE.

Copies of this patent may be obtained for five cents each, by addressing the Kicmmissioner of Patents; Washington, D. 0. 

